#663B26
Closest named color: Purple Brown (#673A3F). oklch(40% 0.069 46.2), rgb(102, 59, 38).
Aa
White text reads best on this color (9.46:1).
About this color
#663B26 is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.069 and its hue 46°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.039 away. White text reads best on it, at 9.46:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.069) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.21:1 |
| White text | 9.46:1 |
Values
| HEX | #663B26 |
| RGB | rgb(102, 59, 38) |
| HSL | hsl(20, 46%, 27%) |
| OKLCH | oklch(40% 0.069 46.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #663B26 | 9.46:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #663B26 | 2.21:1 | Fails | Lc 12.3 | Not readable |
| #663B26 text on white | 9.46:1 | AAA | Lc 91.7 | Preferred for body text |
| #663B26 text on black | 2.21:1 | Fails | Lc -10.7 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F3E7E2
oklch(93.6% 0.015 44.2)
-
Step 200
200
#EAD4CA
oklch(88.5% 0.028 46.1)
-
Step 300
300
#DEB7A5
oklch(80.9% 0.052 46.1)
-
Step 400
400
#CC9174
oklch(70.7% 0.083 47.1)
-
Step 500
500
#BE7450
oklch(63.1% 0.106 46.2)
-
Step 600
600
#A95B34
oklch(55.5% 0.115 45.9)
-
Step 700
700
#914B26
oklch(49.2% 0.107 46.6)
-
Step 800
800
#763E21
oklch(42.8% 0.089 46.6)
-
Step 900
900 (this color)
#663B26
oklch(40% 0.069 46.2)
-
Step 950
950
#381F13
oklch(26.9% 0.044 46)
#663B26 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #474024 | 0.060 |
| Deuteranopia (no green cones) | #514926 | 0.054 |
| Tritanopia (no blue cones) | #6F3336 | 0.040 |
| Achromatopsia (no color) | #464646 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663B26
#663B26
oklch(40% 0.069 46.2)
- #114F64
#114F64
oklch(40% 0.069 225.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #663B26, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.039
- Mud Brown #60460F ΔE 0.047
- Chestnut #742802 ΔE 0.049
- Brownish Purple #76424E ΔE 0.067
- Red Brown #8B2E16 ΔE 0.075
- Rust Brown #8B3103 ΔE 0.075
- Milk Chocolate #7F4E1E ΔE 0.077
- Green Brown #544E03 ΔE 0.079
Use #663B26 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.